Steffen Müller >
Number-WithError-LaTeX-0.06 >
Number::WithError::LaTeX

Module Version: 0.06
Number::WithError::LaTeX - LaTeX output for Number::WithError

use Number::WithError::LaTeX; my $num = Number::WithError::LaTeX->new(5.647, 0.31); print $num . "\n"; # prints '5.65e+00 +/- 3.1e-01' # (I.e. it automatically does scientific rounding) print $num->latex() . "\n"; # prints '5.65 \cdot 10^{0} \pm 3.1 \cdot 10^{-1}' print $num->latex(radix => ',', enclose => '$') . "\n"; # prints '$5,\!65 \cdot 10^{0} \pm 3,\!1 \cdot 10^{-1}$' print $num->encode("This will encode an e-acute (".chr(0xe9).") as \\'e") . "\n"; # Delegated to TeX::Encode::encode(). # prints 'This is a German umlaut: \"a'

This class is a subclass of Number::WithError. It provides the same interface and the same exports.

It adds several methods to every object. The main functionality is provided by `latex()`

, which dumps the object as valid LaTeX code. Also, `encode()`

is a convenient way to encode any UTF-8 string into TeX. It is just a convenience thing since it is delegated to TeX::Encode.

Unlike `Number::WithError`

, this module requires perl version 5.8 or later. (That is the rationale for creating a separate distribution, too.)

This module exports the following subroutines on demand. It supports the `:all`

Exporter tag to export all of them. The subroutines are documented in Number::WithError.

This is a list of public methods.

This method stringifies the object as valid LaTeX code. The returned string is valid in a LaTeX math mode. That means, you will have to enclose it in dollars or in an `equation`

environment by default.

The method takes named parameters. All parameters are optional.

The `enclose`

parameter can set a string to enclose the produced latex code in. This can be either a simple string like `$`

or an array reference containing two strings. Those two strings will be used for the start and end respectively. (For environments.)

Example: (let `$obj`

be '5.6e-01 +/- 2.3e-02')

$obj->latex(enclose => '$'); # returns '$5.6 \cdot 10^{-1} \pm 2.3 \cdot 10^{-2}$'

The asymmetric environment-like `enclose`

can be used as follows:

$obj->latex(enclose => ['\begin{equation}', '\end{equation}']); # returns'\begin{equation}5.6 \cdot 10^{-1} \pm 2.3 \cdot 10^{-2}\end{equation}'

There are two convenience methods `latex_math`

and `latex_equation`

which do exactly what the above examples demonstrated.

The `radix`

parameter can set the radix (*decimal point*) used. The default is a dot (`.`

). If you use a comma, LaTeX will generally typeset it in a way that results in a space after the comma. Since that is not desireable, using a `,`

as the radix results in the radix being set as `,\!`

. An example can be found in the synopsis.

Works exactly like `latex()`

except that the `enclose`

string defaults to `$`

.

Works exactly like `latex()`

except that the `enclose`

string defaults to the environment `\begin{equation}\n`

and `\n\end{equation}`

.

This method encodes an arbitrary UTF-8 string as TeX. Syntax:

my $encoded = $obj->encode($string);

For detailed documentation, please refer to TeX::Encode.

Bugs should be reported via the CPAN bug tracker at

http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Number-WithError-LaTeX

For other issues, contact the author.

It is important that you have a look at the TeX::Encode module if you use the `encode()`

method. The `decode()`

operation from that module, however, is not supported by `Number::WithError::LaTeX`

.

You may use Math::BigFloat with this module. Also, it should be possible to use Math::Symbolic to calculate larger formulas. Just assign a `Number::WithError::LaTeX`

object to the `Math::Symbolic`

variables and it should work.

You also possibly want to have a look at the prefork pragma.

The test suite is implemented using the Test::LectroTest module. In order to keep the total test time in reasonable bounds, the default number of test attempts to falsify the test properties is kept at a low number of 100. You can enable more rigorous testing by setting the environment variable `PERL_TEST_ATTEMPTS`

to a higher value. A value in the range of `1500`

to `3000`

is probably a good idea, but takes a long time to test.

Steffen Mueller <modules at steffen-mueller dot net>, http://steffen-mueller.net/

Copyright 2006 Steffen Mueller. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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